greybus: connection: disconnect connection on failures during initialization

Its possible for connection_init() to fail, in such cases the
disconnected event must be sent to the module.

It is missing currently, fix it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/connection.c

@@ -330,6 +330,27 @@ void gb_connection_destroy(struct gb_connection *connection)
 	device_unregister(&connection->dev);
 }
 
+static void gb_connection_disconnected(struct gb_connection *connection)
+{
+	struct gb_control *control;
+	int cport_id = connection->intf_cport_id;
+	int ret;
+
+	/*
+	 * Inform Interface about In-active CPorts. We don't need to do this
+	 * operation for control cport.
+	 */
+	if (cport_id == GB_CONTROL_CPORT_ID)
+		return;
+
+	control = connection->bundle->intf->control;
+
+	ret = gb_control_disconnected_operation(control, cport_id);
+	if (ret)
+		dev_warn(&connection->dev,
+			"Failed to disconnect CPort-%d (%d)\n", cport_id, ret);
+}
+
 int gb_connection_init(struct gb_connection *connection)
 {
 	int cport_id = connection->intf_cport_id;
@@ -366,15 +387,18 @@ int gb_connection_init(struct gb_connection *connection)
 		spin_lock_irq(&connection->lock);
 		connection->state = GB_CONNECTION_STATE_ERROR;
 		spin_unlock_irq(&connection->lock);
+		goto disconnect;
 	}
 
+	return 0;
+
+disconnect:
+	gb_connection_disconnected(connection);
 	return ret;
 }
 
 void gb_connection_exit(struct gb_connection *connection)
 {
-	int cport_id = connection->intf_cport_id;
-
 	if (!connection->protocol) {
 		dev_warn(&connection->dev, "exit without protocol.\n");
 		return;
@@ -391,21 +415,7 @@ void gb_connection_exit(struct gb_connection *connection)
 	gb_connection_cancel_operations(connection, -ESHUTDOWN);
 
 	connection->protocol->connection_exit(connection);
-
-	/*
-	 * Inform Interface about In-active CPorts. We don't need to do this
-	 * operation for control cport.
-	 */
-	if (cport_id != GB_CONTROL_CPORT_ID) {
-		struct gb_control *control = connection->bundle->intf->control;
-		int ret;
-
-		ret = gb_control_disconnected_operation(control, cport_id);
-		if (ret)
-			dev_warn(&connection->dev,
-				 "Failed to disconnect CPort-%d (%d)\n",
-				 cport_id, ret);
-	}
+	gb_connection_disconnected(connection);
 }
 
 void gb_hd_connections_exit(struct greybus_host_device *hd)